Table 4 Comparison between the studied groups according to Thyroid Ultrasonography
|  | Participants exposed to radioiodine (Group I) (n = 40) | Participants exposed to X-ray (Group II) (n = 40) | Control group (Group III) (n = 40) | p* | p** |
|---|---|---|---|---|---|
Thyroid volume (ml) | |||||
 Min. – Max. | 7.0–18.0 | 4.50–28.20 | 3.0–8.0 | < 0.001* | < 0.001* |
 Mean ± SD. | 10.32 ± 3.42 | 11.65 ± 5.95 | 4.62 ± 1.13 | ||
Thyroid nodules | |||||
 Normal | 27 (67.5%) | 26 (65%) | 36 (90%) | 0.005* | 0.021* |
 Cystic | 7 (17.5%) | 4 (10%) | 3 (7.5%) | ||
 Solid | 4 (10%) | 6 (15%) | 1 (2.5%) | ||
 Mixed | 2 (5%) | 4 (10%) | 0 (0.0%) | ||
% of Diffuse thyroid parenchymal disease | 0% | 30% | 0% | 0.172 | < 0.001* |